Advertisements
Advertisements
प्रश्न
Name a non-metal which is a good conductor of electricity.
उत्तर
Graphite is a non-metal that is a good conductor of electricity.
APPEARS IN
संबंधित प्रश्न
Define the term matter. What is it composed of?
Differentiate between an atom and a molecule.
Fill in the blank :
The state of matter with definite volume and definite shape is called______
When extremely small particles X derived from the anther of a flower were suspended in a liquid Y and observed through a microscope, it was found that the particles X were moving throughout the liquid Y in a very zig-zag way. It was also observed that warmer the liquid Y, faster the particles X moved on its surface.
- What could particles X be ?
- What do you think liquid Y is ?
- What is the zig-zag movement of X known as ?
- What is causing the zig-zag movement of particles X ?
- Name the scientist who discovered this phenomenon.
- What does this experiment tell us about the nature of liquid Y?
Name the property which allows metals to be hammered into thin sheets.
The elements which normally exist in the liquid state are :
Which of the following statements are true for pure substances ?
- pure substances contain only one kind of particles
- pure substances may be compounds or mixtures
- pure substances have the same composition throughout
- pure substances can be exemplified by all elements other than nickel
State whether colloidal solutions are homogeneous or heterogeneous.
Define solute.
What will happen if a saturated solution is :
- heated
- cooled
Name the property of one of the constituents which can be used to separate a mixture of salt and iodine
Pure copper sulphate can be obtained from an impure sample by the process of :
Which of the following cannot be separated from air by the process of fractional distillation ?
The best way to recover sugar from an aqueous sugar solution is :
The liquid air has three components X, Y and Z whose boiling points are : –186°C, –183°C and –196°C,
respectively. When liquid air is fed into a tall fractional distillation column from near its bottom and warmed
up slowly :
(a) Which component will be collected from near the bottom of the fraction distillation column ? Why ?
(b) Which component will be collected from the top part of the fractional distillation column ? Why ?
(c) Which component will be collected from the middle part of the fractional distillation column ? Why ?
(d) What could the component X, Y and Z be ?
Define the term matter.
Name the metals that are used in jewellery.
The movement of particles in liquids is ______.
Gases change to liquid by the process of ______.
Define the term matter.
